What is required regarding fingernails for cadets?

Fingernails must be clean and trimmed is the required standard for cadets. This guideline is important as it promotes a sense of discipline and uniformity within the cadet system. Clean and trimmed nails reflect professionalism and attention to personal grooming, which are essential traits for cadets. Maintaining neat fingernails helps to prevent potential hygiene issues and is part of the overall expectation of polished appearance in uniformed environments.

The other choices do not align with the expected standards for cadets. Brightly colored nails or long, decorative nails can be viewed as unprofessional and distracting, undermining the image and standards of discipline that cadets are trained to uphold. Furthermore, while cleanliness is important, simply having any length nails that are clean does not adhere to the requirement for them to be trimmed, which ensures functionality and safety in a disciplined setting.